1 John 5:15

and, if we know that He heareth us whatsoever we ask, we know that we have the petitions which we asked of Him.

Mark 11:24

Therefore, I say to you, all things whatsoever ye pray and ask for, believe that ye received them, and ye shall have them.

Luke 11:9-10

And I say to you, ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened to you:

1 John 5:18-20

We know that every one who has been begotten of God sins not; but he who was begotten of God keeps himself, and the evil one touches him not.

Treasury of Scripture Knowledge

Summary

And if we know that he hear us, whatsoever we ask, we know that we have the petitions that we desired of him.

General references

Bible References

We know

Mark 11:24
Therefore, I say to you, all things whatsoever ye pray and ask for, believe that ye received them, and ye shall have them.
Luke 11:9
And I say to you, ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened to you:

General references

Matthew 21:22
And all things whatsoever ye ask in prayer, believing, ye shall receive."